Global sea surface height. Highly-distorted globe depicting sea surface heights over the World. The colours depict deviation from the mean sea surface caused by local differences in the Earth's gravity field. The colours run from purple (higher than mean) through red, orange, yellow (mean), green to blue (lower than mean). Land masses are shown in grey. The deviation from the ideal spherical globe has been much exaggerated to create the distorted shape. Local topography is shown in shaded relief. The data for this image were gathered by the European ERS-1 radar mapping satellite.
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